There is some confusion regarding the Message-id header. Messages created with Outlook Express have a message id field, but at this time we are not sure where exactly it goes in the order of headers. The format of the field is like this:

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<pre>Message-id: <000f10c7183d$abe4d510$6031a8c0@hostname></pre>

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This example was not actually generated by Outlook Express. It's a real message id field with some of the digits randomly replaced. The key things to note are the two dollar signs in the field and bare hostname (i.e. no TLD information).

Message ID Field

There is some confusion regarding the Message-id header. Messages created with Outlook Express have a message id field, but at this time we are not sure where exactly it goes in the order of headers. The format of the field is like this:

Message-id: <000f10c7183d$abe4d510$6031a8c0@hostname>

This example was not actually generated by Outlook Express. It's a real message id field with some of the digits randomly replaced. The key things to note are the two dollar signs in the field and bare hostname (i.e. no TLD information).